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checkboxes,arrays & JS syntax….

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Feb 28.2003

Hello to all the community,I’m really brand new….

Pls :

I have a form that post data to a php script by checkboxes.
Iwould like to introduce a button that check all the boxes,but…

1 <head>
2 //here the JS script works fine
3 <head>
4 <body>
5 <form method=”post” action=”myscript.php”>
6 <input type=”checkbox” name=”sendid[]” value=”Jim”>
7 <input type=”checkbox” name=”sendid[]” value=”John”>
8 <input type=”checkbox” name=”sendid[]” value=”Mary”>
9 <input type=button value=”Check All” onClick=”this.value=check(this.form.sendid[])”>
10 <input type=”submit” name=”send_data” value=”data”>
11 </form>

Now,the values of checkboxes have to be like
[B]sendid[][/B] because I need to pass an array to my script to be counted() and then imploded(),but if the action of my “Check All” button call the function [B]“check(this.form.sendid[])[/B] i get a syntax error because JS does not like the [B][][/B] .
Anyway,the JS script run well if I omit the [] but of course in this case the form is not going to pass an array to the PHP script.
Do anybody has idea about the way I can solve this problem??

Thank you very much.

Massimo

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JavaScript

4 Comments(s) ↴

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@Phil_KarrasFeb 28.2003 — Here's a function to clear all checked boxes I used for a different question, change the [b]...checked = false[/b] to [b]...checked = true[/b] and it should then do what you want.

You will also need to change the names of the form and the checkboxes in my function to match yours & of course you'll want to change the name of the function:
<i>
</i> function ClearChecks() {
var max = document.ckbox.checkboxname.length;
for (var i=0; i&lt;max; i++) {
eval("document.ckbox.checkboxname["+i+"].checked = false");
}
}
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@vronskyauthorFeb 28.2003 — Sorry Phil,but my problem is not in in the JS function

var checkflag = "false";

function check(field) {

if (checkflag == "false") {

for (i = 0; i < field.length; i++) {

field[i].checked = true;}

checkflag = "true";

return "Uncheck All"; }

else {

for (i = 0; i < field.length; i++) {

field[i].checked = false; }

checkflag = "false";

return "Check All"; }

}



that works fine,but in the name of the checkboxes that ,being an array,and posting to a PHPscript has to be like

[B]sendid[][/B] with that [B][][/B] that gives me a syntax error....

May be you now how to replace or to arrange the [B][][/B] so

the browser can parse() it correctly???

Thank you..
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@Phil_KarrasFeb 28.2003 — OK, then that's not a JS question at all.

I have a test site that I have a PHP script on that shows what was posted to it.

Now, I know of no way to make the check boxes into an array that would be sent to the site.

On the other hand, you can use a hidden field to concatenate all the values and once on the php side use split to put them all into an array. Use "|" or something that will NOT be in any value to be the split char. Since that's now a php question you'll have to go elsewhere for how to do that if you don't know.

As to building the long string if you have problems ask again.
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@vronskyauthorMar 03.2003 — Thanks Phil,Thanks Dave...

the code

[B]<input type=button value="Check All" onClick="this.value=check(this.form.elements["sendid[]"])"> [/B]

gives still a syntax error,but if I omit the [B]"[/B] like

[B]<input type=button value="Check All" onClick=this.value=check(this.form.elements["sendid[]"])> [/B]

it look like working...

Now I'm going to test it better,but,not being a JS competent,I would like to know why...
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